Transformers are simple to make but still very useful electrical devices, and they work on the basis of a phenomenon known as electromagnetic induction. The field induces an electric current in the wire, if you place a conducting wire in a changing magnetic field. And where there's a current, there's a potential difference or voltage and vice versa. This changing current in a conductor makes a magnetic field around, because the current has to be changing in transformers. Transformers work only with AC electricity and this is an advantage of AC over DC power.
The voltage depends on how many times the conductor passes through the magnetic field. The voltage in one circuit, “the primary circuit” can be transformed to a different voltage in a secondary circuit by adjusting the number of times the conductors for each circuit pass through the magnetic field. The device that is used to perform this action is called a transformer. When it reduces the voltage in the secondary circuit then it is known as a step-down transformer. The working is exactly what the transformer on the power line does that is Outside your house. It's although easy to make your own step-down transformer, but it won't be as big and powerful as the one on the power line or the one made by Step Down Transformer Manufacturer India. However, it will work in exactly the same way.
Transformers Use Windings
The ratio of the number of windings in the primary and secondary coils determines the voltage in the secondary coil. The formula the transformer follows from Faraday's law, is:
Ns/Np = Vs/Vp
Ns and Np are the no. of windings in the secondary and primary coils respectively Vs and Vp are the voltages in the secondary and primary coils respectively.
In a step-down transformer, the secondary voltage should be less than the primary voltage. And for that the number of windings in the secondary coil must be kept less than the number in the primary coil. If you are aware about the voltage in the primary circuit then you can set a target for the secondary coil and you achieve your target by simply adjusting the number of windings on both coils.
Constructing a Step-Down Transformer
For constructing a Step Down Transformer you can use any conducting wire to make the coils, but it will be best if you use 28-gauge magnetic wire. It is a very thin copper wire coated with insulation. To create the primary coil you need to wrap the wire closely around the washer at least 500 times while keeping the wire tight. You can also wind it in layers if you feel it necessary. Be careful while counting the number of windings and keep the record of the numbers. When you're done winding, wrap masking tape around the wires to keep them in place keeping the two ends free for connection to the power source.
Since you're constructing a step-down transformer, you need to keep the number of windings in the secondary coil smaller than the primary one. The actual number of windings will depend on the voltage you want, and you can calculate this by using the transformer formula. In the next step you need to wind the secondary coil on top of the primary coil and leave the ends free to connect to a meter. Again wrap the coil with masking tape and at the end wrap the entire transformer with electrical tape to insulate it. Your Step Down Transformer is ready to test. If you are looking for the best quote for Step Down Transformer Price, don’t go beyond Servo Star the Leading Servo Stabilizer and Transformer Manufacturer Supplier in Delhi, India.